Planogr



A. SMALLWOOD.

FURNACE FOR TREATING ARTICLES.

APPLICATION FILED SEPT- 19. 1916- Patented Aug. 12,1919.

THE COLUMBIA PLANoGnM-u cm. WASHINGTON, IL

ALFRED sMALLwoo-n, 0F HIGI-IGATE, LONDON, ENGLAND.

FURNACE FOR TREATING- ARTICLES.

Specification of Letters Patent.

Patented'Aug. 12, 1919.

. Application filed September 19, 1916. Serial No. 121,674.

To all whom it may concern:

Be it lmown that I, ALFRED SMALLWOOD,\3. subject of the Kingdom of GreatBritain, residing at d2 Hal-grave Park, Highgate, London, N., in thecounty of Middlesex, England, have invented certain new and usefulImprovements in or Relating to Furnaces for Treating Articles, of whichthe following is a specification.

This invention comprises certain improvements in or relating to furnacesfor heating, hardening, tempering, annealing, carbonizing and otherprocesses.

According to the present invention the heating chamber of the furnace isprovided with a removable bung or closure member, said bung or closuremember being adapted to be displaced to permit of the article orarticles contained in the heating chamber being lowered therefrom belowthe level of the bung.

The present invention further comprises a furnace having a bung orclosure member and in which mechanical means are provided for loweringand raising said bung or closure member and also for permitting of alateral movement of said bung or closure member. With this object inview the bung or closure member may be carried by a truck or carriageadapted to run on carrier means, such carrier means being adapted to beraised or lowered.

In order that this invention may be clearly understood and readilycarried into practice, reference may be had to the appended explanatorysheets of drawings, upon which Figure l is a sectional side elevation ofmy device.

Fig. 2 illustrates certain details of construction of the guide membersutilized in connection with the sealing member, taken on line A-A ofFig. 1.

In my present invention at the bottom a heating chamber is closed by abung adapted to be removed in such a manner as to permit of the goodsbeing lowered from the heating chamber into an oil or other bath, as forinstance for tempering purposes.

The bung is adapted to be readily removable and is conveniently of acharacter sufliciently substantial to take the weight of the goods,which latter are advantageously suspended in the heating chamber, butmay ave to rest upon the bung.

With this object in view the bung r, Fig. 8, may be carried by a truck 8adapted to be moved laterally or horizontally on rails t.

The rails 25 are adapted to be raised and lowered, as for instance bybeing mounted with links 21., u to be displaced by a parallel motion,the links being operated in any suitable manner, as for instance by aworm 0 engaging with a quadrant w fixed co-aXially with one of the linksto.

Between the bung r and the lower extremity of the heating chamber, asand or other seal 00' is incorporated, and in separating the bung fromthe heating chamber it is first necessary to lower the bung to withdrawthe latter from the lower part of the heating chamber and also toseparate the sand or other seal 00, after which the carriage 8 carryingthe bung is displaced laterally along the rails 27, by any approvedmechanism. Guides 2 and z are provided to maintain the bung r andcarriage s in central relationship to the heating chamber a during itsvertical displacement.

Below the level at which the carriage works a tank 2 is incorporated sothat after the removal of the bung by the carriage, the goods containedin the heating chamber can be lowered into the tank, which may, forinstance, contain oil. The bung operating mechanism is contained in aspace which is sealed from the atmosphere, and the opening in this spacepermitting of access to the tank is adapted to be sealed. For thispurpose a sealing member 3 in the nature of a cylinder having near itsupper edge one portion 4 of an annular sealing device adapted tocooperate with the other portion 5 of such sealing device providedaround the outlet offering access to the tank 2, is adapted to belowered into the tank in such a manner that when the sealing parts 4, 5,are in cooperation, the lower part of the cylinder 3 dips below thesurface of liquid in the tank, and thereby effectively closes the spacecontaining the bung operating mechanism from the space containing thetank and therefore from the atmosphere, while permitting of access tothe contents of the tank. The tank is contained in a pit and is adaptedto be moved laterally, as for instance by be ing provided withanti-friction members adapted to work upon runners. Lateral displacementof the tank is permitted by the cylindrical sealing member 3, which maybe raised clear of the upper surface or edge of the tank 2 to permit ofthe lateral displacement of the latter. Suitable guiding means 7 areprovided for guiding the sealing member 3 in its vertical movements, andsuch movements may be imparted to said sealing member 3 by any suitablemechanism, such as a cord 8 carried around suitably disposed pulleys toa point for convenient operation.

The tank for containing oil may have a hollow wall 6 which may containwater for cooling purposes.

When the bung is removed from under the article the latter is supportedby a crane by means of any suitable holding device, passing into the topof the furnace chamber.

It is by this means that the article is lowered into the oil bath.

What I claim as my invention and desire to secure by Letters Patent is Afurnace having a closure member, mechanical means for lowering andraising said closure member, such closure member being adapted to becarried by a truck or carriage capable of running .011 carrier means, astationary part, links connecting such carrier means with saidstationary part, the said carrier means being adapted to be displaced bya parallel motion.

In witness whereof I have hereunto set my hand.

ALFRED SMALLWVOOD.

Copies ofithis patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

